Howdy all, first time poster long time reader

the current exhaust setup on my 00' is stock headers, cats, stock y, magnaflow si/so muffler (#14580 i think, but am not 100% positive) 2.25" out to ss magnaflow tips (#35114).

i plan on adding some magnaflow high flow cats (1 to each side) but am wondering if now is the time to replace the stock y pipe and my current magnaflow muffler with a di/do (#14568 maybe?) or just got with a highflow y pipe and keep my current muffler.

would there be that much of a perfermance change that it would be worth the extra$?

 

im about to put on hi flo's on my 98 4.6 and then run true dual straight pipe (2.5") all the way out the back. I dont think your truck would see much of a torque loss by doing that, but i would keep the 2.5" pipe. From what ive heard, hi flo's make it considerably louder.

 

well... i thought about the straight pipes, but i really don't like the sound of them. imo, the magnaflow mufflers make em sound sweeeeet